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Exploited vulnerability · CISA KEV

Is CVE-2017-0037 exploited? Yes: in CISA KEV since 28 Mar 2022

Gociux · Microsoft Edge and Internet Explorer · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2017-0037, Microsoft Edge and Internet Explorer Type Confusion Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 28 Mar 2022, 1856 days after it was published. It affects Microsoft Edge and Internet Explorer. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 28 Mar 2022
ransomwareNot knownno confirmed use
EPSStop 1%among the most likely CVEs to be exploited
severity8.1CVSS 3.1 · high
US federal due18 Apr 2022BOD 22-01 deadline

What it is

Microsoft Edge and Internet Explorer have a type confusion vulnerability in mshtml.dll, which allows remote code execution.

VendorMicrosoft (391 exploited CVEs in KEV)
ProductEdge and Internet Explorer
VulnerabilityMicrosoft Edge and Internet Explorer Type Confusion Vulnerability
WeaknessCWE-704
Published26 Feb 2017
Added to KEV28 Mar 2022
Reported by (CNA)microsoft

What to do

  1. Check whether you run it. Look for Edge and Internet Explorer in your asset inventory, including appliances and cloud images. Stack check lists every exploited Microsoft CVE at once.
  2. Apply the fix. Apply updates per vendor instructions.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 26 Feb 2017.
  4. Get told next time. Email alerts when CISA adds a CVE for Microsoft.

Other exploited CVEs in Edge and Internet Explorer

References

Questions

Is CVE-2017-0037 being exploited?

Yes. CISA added CVE-2017-0037 to the Known Exploited Vulnerabilities catalog on 28 Mar 2022, which means there is reliable evidence of exploitation in the wild.

Is CVE-2017-0037 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2017-0037?

Apply updates per vendor instructions. Check Microsoft's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Edge and Internet Explorer and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in March 2022 · Microsoft scorecard · act-now radar.

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